Dell laptop screen turns off when using.

I recently bought a Dell Inspiron 7559 model laptop. It has 8 Gb memory and 4 GB NVidia GTX 960 graphics.

Full Specs Here: https://www.dell.com/en-us/shop?showMessage=1

It's the one that costs $799.99 but is offered at $749.99.

Now back to the issue.

Sometimes when using the laptop, at some random time, the laptop's screen goes blank. The screen gets shut off. Then, the usb keyboard loses power. However, the system isn't shutting down. It keeps staying in ON state. Even the backlight keyboard seems to be working i.e. when I press it, it lights up. But, the system does not respond.

Then, the only option that I can do is click the power button to shut down the system. Then, reopen it again.

How can I solve this particular problem?